Decrypting Text - code breaking software
The Colossus at Bletchley

Letter replacement

Encrypted text is sometimes achieved by replacing one letter by another. This page allow you to replace some or all of the letters in the text with replacement letters.


The box below contains example ciphertext. You can paste your own text that you want to decipher into this. Then fill in your replacement letters.
Enter your ciphertext below
Enter your replacement letters below
a b c d e f g h i j k l m
n o p q r s t u v w x y z

 Click here to replace unreplaced letters with a dot